EP 0125479 A1 19841121 - Flexible optical disc.
Title (en)
Flexible optical disc.
Title (de)
Optische flexible Platte.
Title (fr)
Disque optique souple.
Publication
Application
Priority
US 16076980 A 19800618
Abstract (en)
[origin: WO8103712A1] An improved method of stabilizing a flexible optical disc while information is written and/or read thereon involves: (1) predeterminedly positioning a flat, uniformly thick, flexible, optical disc with respect to an axis of rotation; (2) rotating the disc on such axis at a high speed and in a predeterminedly spaced relation to a predeterminedly shaped, smooth, featureless reference surface and (3) coupling a central region between the disc and reference surface to an ambient gas source. Related apparatus and disc configurations, including embodiments having flexible disc covers, also are disclosed.
IPC 1-7
IPC 8 full level
G11B 23/00 (2006.01); G11B 7/00 (2006.01); G11B 7/004 (2006.01); G11B 17/32 (2006.01); G11B 25/04 (2006.01)
CPC (source: EP US)
G11B 17/32 (2013.01 - EP US)
Citation (search report)
- [X] FR 2326005 A1 19770422 - PHILIPS NV [NL]
- [A] FR 2304137 A1 19761008 - PHILIPS NV [NL]
- [A] US 4074282 A 19780214 - BALAS JR CHARLES, et al
- [A] GB 1141506 A 19690129 - INT COMPUTERS LTD
- [A] FR 2275843 A1 19760116 - THOMSON BRANDT [FR]
- [A] FR 2198202 A1 19740329 - PHILIPS NV [NL]
- [A] US 3663752 A 19720516 - FROSCHLE ERNST
- [A] CA 598589 A 19600524 - FERRANTI ELECTRIC LTD
- [A] GB 849488 A 19600928 - FERRANTI LTD
- [A] EP 0010017 A1 19800416 - THOMSON CSF [FR]
- [AP] US 4308041 A 19811229 - ELLIS JERRY R, et al
- [A] DE 2206717 A1 19730823 - TED BILDPLATTEN
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 8103712 A1 19811224; EP 0054039 A1 19820623; EP 0054039 A4 19820910; EP 0125479 A1 19841121; EP 0125479 B1 19880203; JP S57500953 A 19820527; JP S59215028 A 19841204; US 4447899 A 19840508
DOCDB simple family (application)
US 8100704 W 19810527; EP 81901478 A 19810527; EP 84103897 A 19810527; JP 2944184 A 19840218; JP 50185581 A 19810527; US 16076980 A 19800618